From Middle English, equivalent to for- + straught (“stretched”). Compare bestraught, distraught, etc. More at for-, straught.
forstraught (comparative more forstraught, superlative most forstraught)
- (obsolete, rare) Distracted.
(Can we date this quote?), Thomas Chatterton, “The storie of William Canynge”, in The Poetical Works of Thomas Chatterton, published 1890:
- My sense, forgard, could not run away, / But were not forstraught when she did alight
2009, My Lord John, page 37:
- It was enough, Johanna said, to make the sely children forstraught.